/* color palette from <https://github.com/vuejs/theme> */
:root {
  --vt-c-white: #ffffff;
  --vt-c-white-soft: #f8f8f8;
  --vt-c-white-mute: #f2f2f2;

  --vt-c-black: #181818;
  --vt-c-black-soft: #222222;
  --vt-c-black-mute: #282828;

  --vt-c-indigo: #2c3e50;

  --vt-c-divider-light-1: rgba(60, 60, 60, 0.29);
  --vt-c-divider-light-2: rgba(60, 60, 60, 0.12);
  --vt-c-divider-dark-1: rgba(84, 84, 84, 0.65);
  --vt-c-divider-dark-2: rgba(84, 84, 84, 0.48);

  --vt-c-text-light-1: var(--vt-c-indigo);
  --vt-c-text-light-2: rgba(60, 60, 60, 0.66);
  --vt-c-text-dark-1: var(--vt-c-white);
  --vt-c-text-dark-2: rgba(235, 235, 235, 0.64);
}

/* semantic color variables for this project */
:root {
  --color-background: var(--vt-c-white);
  --color-background-soft: var(--vt-c-white-soft);
  --color-background-mute: var(--vt-c-white-mute);

  --color-border: var(--vt-c-divider-light-2);
  --color-border-hover: var(--vt-c-divider-light-1);

  --color-heading: var(--vt-c-text-light-1);
  --color-text: var(--vt-c-text-light-1);

  --section-gap: 160px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-background: var(--vt-c-black);
    --color-background-soft: var(--vt-c-black-soft);
    --color-background-mute: var(--vt-c-black-mute);

    --color-border: var(--vt-c-divider-dark-2);
    --color-border-hover: var(--vt-c-divider-dark-1);

    --color-heading: var(--vt-c-text-dark-1);
    --color-text: var(--vt-c-text-dark-2);
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  font-weight: normal;
}

body {
  min-height: 100vh;
  color: var(--color-text);
  background: var(--color-background);
  transition:
    color 0.5s,
    background-color 0.5s;
  line-height: 1.6;
  font-family:
    Inter,
    -apple-system,
    BlinkMacSystemFont,
    'Segoe UI',
    Roboto,
    Oxygen,
    Ubuntu,
    Cantarell,
    'Fira Sans',
    'Droid Sans',
    'Helvetica Neue',
    sans-serif;
  font-size: 15px;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
.corMain{
  color: #FF4000;
}

.d-flex{display: flex;}
.a-center{align-items: center;}
.a-end{align-items: flex-end;}
.j-sb{justify-content: space-between;}
.f-wrap{flex-wrap: wrap;}
.f-colu{flex-direction: column;}
.j-center{justify-content: center;}
.j-end{justify-content: flex-end;}
.a-start{align-items: start;}
.f-baseline{align-items: baseline;}

/* flex布局 */
.flex1{flex: 1;}
[class*=flex-]{display:-webkit-box;display:-ms-flexbox;display:-webkit-flex;display:flex;}
[class*=-aic]{ -ms-flex-align: center;align-items: center;}
[class*=-aife]{-ms-flex-align: end;align-items: flex-end; }
[class*=-aifs]{-ms-flex-align: start;align-items: flex-start; }
[class*=-ais]{-ms-flex-align: stretch;align-items: stretch;}
[class*=-jcc]{ -ms-flex-pack: center;justify-content: center;}
[class*=-jcsb]{-ms-flex-pack: justify; justify-content: space-between;}
[class*=-jcfe]{-ms-flex-pack: end;justify-content: flex-end; }
[class*=-jcfs]{-ms-flex-pack: start;justify-content: flex-start; }
[class*=-row]{flex-direction: row;-ms-flex-direction: row; flex-wrap: wrap;}
[class*=-column]{flex-direction: column;-ms-flex-direction: column; }
[class*=-aifb]{align-items: baseline;}
.inline-flex{display: inline-flex;}
.t-center{text-align: center;}
.d-block{display: block;}
.underline:hover{text-decoration: underline;}

.font24{
  font-size: 24px;
}
.t-center{
  text-align: center;
}
.cor000{
  color: #000;
}
.cor999{color: #999;}
.corGreen{color: #00753e;}
.pr{position: relative;z-index: 5;}
.ab{
  position: absolute;
  z-index: 3;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
}
.bgfff{background-color: #fff;}
.pointer{cursor: pointer;}
.w100{width: 100%;}
.mt15{margin-top: 15px;}
.mr20{margin-right: 20px;}
.mr10{margin-right: 10px;}
.ml20{margin-right: 20px;}
.ml10{margin-right: 10px;}
.d-block{display: block;}
.min400{min-height: 400px;}